Metal–Insulator Transition in Optical Lattice System with Site-Dependent Interactions

Metal–Insulator Transition in Optical Lattice System with Site-Dependent Interactions

We investigate the half-filled Hubbard model with spatially alternating interactions by means of the two-site dynamical mean-field theory. It is found that a single Mott transition occurs when two kinds of interactions are increased. This implies that the different interactions are essentially irrel...

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Veröffentlicht in:Journal of superconductivity and novel magnetism 2013-05, Vol.26 (5), p.1771-1774
Hauptverfasser: Saitou, T., Koga, A., Yamamoto, A.
Format: Artikel
Sprache:eng
Schlagworte:
Characterization and Evaluation of Materials
Condensed Matter Physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Critical point
Dynamical systems
Dynamics
Electron states
Exact sciences and technology
Magnetic Materials
Magnetism
Metal-insulator transitions and other electronic transitions
Optical lattices
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Beschreibung
Zusammenfassung:We investigate the half-filled Hubbard model with spatially alternating interactions by means of the two-site dynamical mean-field theory. It is found that a single Mott transition occurs when two kinds of interactions are increased. This implies that the different interactions are essentially irrelevant at the critical point. The nature of the Mott states is also addressed.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-012-2064-5